Call of Duty: Black Ops - The 20 Best Zombie Video Games

First featured in World at World, Black Ops brought back the much loved
Zombies, this time featuring famous leaders from the Cold War era such as
JFK, Nixon and Fidel Castro, each preaching their own brand of political
maxims. Playing co-operatively online or with real life friends, Zombies is
an insanely addictive format and a welcome addition to the Call of Duty
repertoire.